Hi, On 17/01/12 16:09, Stanislav Meduna wrote: > On 17.01.2012 10:36, Tomas Frydrych wrote: >> Some of the more recent gccs were not producing usable binaries on some >> platforms (including arm) with the -Os option. I do not know if this is >> the case with 4.6.2, and I don't think ecos uses -Os by default, but it >> is probably worth checking whether this works (and at least documenting >> somewhere if it does not). > > Do you happen to have more details on this - versions, flags used, > example to reproduce...? > > http://gcc.gnu.org/onlinedocs/gcc/Optimize-Options.html says > > -Os enables all -O2 optimizations that do not typically increase > code size. It also performs further optimizations designed > to reduce code size. > > it would be good to know whether the problems come from -O2 (which > would be a major problem) or from these further optimizations.
It was known to be present in gcc 4.5.1, and it was not effecting the -O2 option, only -Os. The openembedded/yoctoproject guys run into it building u-boot, and it was mentioned yesterday on the poky mailing list, https://lists.yoctoproject.org/pipermail/poky/2012-January/007472.html. Tomas
